Thermodynamic basis of twin-related variant pair in high strength low alloy steel. (September 2019)

• Record Type: Journal Article
• Authors: Wu, B.B.; Wang, Z.Q.; Yu, Y.S.; Wang, X.L.; Shang, C.J.; Misra, R.D.K.
• Is Part Of: Scripta materialia. Number 170(2019)
• Page Start: 43
• Page End: 47
• Publication Date: 2019-09
• Subjects: Steel -- Variant pair -- Bainite -- Phase transformation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.05.016
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We elucidated here the mechanism of formation of twin-related V1/V2 variant pair from the perspective of thermodynamics. It was observed that the low cooling rate and phase transformation near Ms temperature contribute to produce more V1/V2 variant pairs. The reason why the content of V1/V2 variant pairs in the lath bainite is higher than that of martensite is the diffusion of carbon, which the local carbon enrichment promotes the increase of the content of V1/V2 variant pairs. The microstructure of high-hardenability steel at low cooling rates is mainly lath bainite with a higher content of V1/V2 variant pairs. Graphical abstract: Unlabelled Image